Electrical stimulator



FIG. 1 is a top perspective view of an electrical stimulator showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the figures are included for the purpose of illustrating portions of an electrical stimulator and form no part of the claimed design. 

CLAIM The ornamental design for an electrical stimulator, as shown and described. 